9. shot (n.) a consecutive series of pictures that constitutes a unit of action in a film
The vacuum level is determined by the pressure differential between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. Most refer to the height of a column of mercury â usually inches of mercury (in.-Hg) or millimeters of mercury (mm-Hg).
As good as these vacuums are, they do require regular service due to the cyclones becoming clogged. The only way to do it is by taking it apart.This can be done by anyone however some unusual tools are required such as a star screwdriver.1  Howto & Style.s good as these vacuums are, they do require regular service due to the cyclones becoming clogged. The only way to do it is by taking it apart. This can be done by anyone however some unusual tools are required such as a star screwdriver. 1  Howto & Style.